Hello Rebecca,
Thank you for your message!
In terms of well-being and mental health, as an engineering student I think what helped me the most was doing extracurricular activities, such as sports and being part of societies I identify with. In that way, I met a lot of people that had been in my position previously and I learnt so much from them. To add to that, any engineering course can be quite draining and having at least an hour per day to not worry about a certain module and to put myself first makes everything easier.
I hope my answer helps!